322720 has 24 divisors (see below), whose sum is σ = 762804. Its totient is φ = 129024.

The previous prime is 322709. The next prime is 322727. The reversal of 322720 is 27223.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 318096 + 4624 = 564^2 + 68^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 322694 and 322703.

It is not an unprimeable number, because it can be changed into a prime (322727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849 + ... + 1168.

2³²²⁷²⁰ is an apocalyptic number.

It is an amenable number.

322720 is an abundant number, since it is smaller than the sum of its proper divisors (440084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

322720 is a wasteful number, since it uses less digits than its factorization.

322720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032 (or 2024 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 322720 is about 568.0845007567. The cubic root of 322720 is about 68.5922886271.

Adding to 322720 its reverse (27223), we get a palindrome (349943).

The spelling of 322720 in words is "three hundred twenty-two thousand, seven hundred twenty", and thus it is an iban number.